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Title: Preparation of grout for stabilization of abandoned in-situ oil shale retorts. [Patent application]

Abstract

A process is described for the preparation of grout from burned shale by treating the burned shale in steam at approximately 700/sup 0/C to maximize the production of the materials alite and larnite. Oil shale removed to the surface during the preparation of an in-situ retort is first retorted on the surface and then the carbon is burned off, leaving burned shale. The burned shale is treated in steam at approximately 700/sup 0/C for about 70 minutes. The treated shale is then ground and mixed with water to produce a grout which is pumped into an abandoned, processed in-situ retort, flowing into the void spaces and then bonding up to form a rigid, solidified mass which prevents surface subsidence and leaching of the spent shale by ground water.

Inventors:
Issue Date:
OSTI Identifier:
6891094
Assignee:
Dept. of Energy TIC; ERA-06-001978; EDB-80-126858
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
04 OIL SHALES AND TAR SANDS; IN-SITU RETORTING; GROUTING; STABILIZATION; SPENT SHALES; WASTE PRODUCT UTILIZATION; RETORTS; CHEMICAL REACTIONS; CHEMICAL REACTORS; DECOMPOSITION; DISTILLATION EQUIPMENT; EQUIPMENT; IN-SITU PROCESSING; PROCESSING; RETORTING 040900* -- Oil Shales & Tar Sands-- Waste management

Citation Formats

Mallon, R.G. Preparation of grout for stabilization of abandoned in-situ oil shale retorts. [Patent application]. United States: N. p., 1979. Web.
Mallon, R.G. Preparation of grout for stabilization of abandoned in-situ oil shale retorts. [Patent application]. United States.
Mallon, R.G. Fri . "Preparation of grout for stabilization of abandoned in-situ oil shale retorts. [Patent application]". United States.
@article{osti_6891094,
title = {Preparation of grout for stabilization of abandoned in-situ oil shale retorts. [Patent application]},
author = {Mallon, R.G.},
abstractNote = {A process is described for the preparation of grout from burned shale by treating the burned shale in steam at approximately 700/sup 0/C to maximize the production of the materials alite and larnite. Oil shale removed to the surface during the preparation of an in-situ retort is first retorted on the surface and then the carbon is burned off, leaving burned shale. The burned shale is treated in steam at approximately 700/sup 0/C for about 70 minutes. The treated shale is then ground and mixed with water to produce a grout which is pumped into an abandoned, processed in-situ retort, flowing into the void spaces and then bonding up to form a rigid, solidified mass which prevents surface subsidence and leaching of the spent shale by ground water.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {12}
}